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varargs

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Posted by Robin Lionheart   (14 posts)  [Biography] bio
Date Fri 24 Nov 2006 10:12 AM (UTC)
Message
I tried to make a varargs function

function debug_message(...)
	if GetVariable("Debug") then
		Note(unpack(arg))
	end
end


But the unpack() line merely threw an error about arg being nil. Perhaps I'm not following the Lua manual correctly. Am I missing something?
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Posted by Ked   Russia  (524 posts)  [Biography] bio
Date Reply #1 on Fri 24 Nov 2006 10:57 AM (UTC)
Message
It's
Note(unpack(...))
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Posted by Nick Gammon   Australia  (21,675 posts)  [Biography] bio   Forum Administrator
Date Reply #2 on Fri 24 Nov 2006 08:31 PM (UTC)
Message
Not quite, Ked.

Under Lua 5.0 there was a dummy "arg" variable created by Lua for functions that had the "..." syntax. Now (in Lua 5.1) you just refer to "..." where you need the arguments. So your function should look like this:


function debug_message(...)
  if GetVariable("Debug") then
    Note(...)
  end
end


- Nick Gammon

www.gammon.com.au, www.mushclient.com
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Posted by Ked   Russia  (524 posts)  [Biography] bio
Date Reply #3 on Sat 25 Nov 2006 01:37 AM (UTC)
Message
Ah, right. I didn't pay attention to how the list was actually being used.
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